Bryan Johnson, entrepreneur and longevity pioneer, just completed one of his most ambitious health experiments yet—60 sessions of hyperbaric oxygen therapy (HBOT) in 90 days.
The results weren’t just impressive. They were transformative.
Johnson’s biomarkers improved across nearly every measure, from zero detectable inflammation to dramatic skin rejuvenation.
He now calls HBOT “the most efficacious longevity therapy I’ve done since starting this endeavor.”
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What Is Hyperbaric Oxygen Therapy?
HBOT involves breathing 100% pure oxygen inside a pressurized chamber. Johnson’s protocol used a chamber pressurized to 2 ATA—equivalent to being 33 feet underwater.
This increased pressure saturates body tissues with oxygen far beyond normal levels. More oxygen means faster healing, enhanced mitochondrial function, and potentially slower aging.
While HBOT might sound exotic, it’s used by scuba divers recovering from decompression sickness, stroke patients, and elite athletes seeking performance gains.
Johnson’s Rigorous 90-Day Protocol
To make 5,400 minutes of chamber time feasible, Johnson installed an HBOT unit at his clinic. That way he could work during sessions instead of losing hours commuting.
I knew if it was at some local clinic where it took a 15-minute drive to get there, I would never be able to spend the 5,400 minutes doing that.
Each 90-minute session followed a specific pattern: 20 minutes breathing pure oxygen, 5-minute break, 20 minutes oxygen, another break. This cycling creates periods of high and low oxygen, which appears critical for triggering beneficial adaptations.
Johnson measured extensive baseline biomarkers before starting, then repeated all tests after completing his 60 sessions.
Early Challenges Nearly Derailed Everything
By day five, Johnson wasn’t seeing benefits and questioned whether he could complete the protocol. Studies showed gains accumulate over time, not immediately—but that required faith.
Technical problems emerged too. Their initial oxygen concentrator only reached 92% oxygen instead of the required 100%. Johnson had to source medical-grade oxygen canisters to solve this.
Claustrophobia, breathing resistance from the mask, and sheer time commitment created additional obstacles.
By day 30 I was again questioning, am I really going to pull this off? My days are incredibly busy. I’m running four different companies.
Everything changed when Johnson realized he could safely work inside the chamber. It transformed from a tedious obligation into productive daily ritual.
The Remarkable Results
After 60 sessions, Johnson’s biomarkers told a stunning story of whole-body rejuvenation.
Zero Inflammation
High-sensitivity C-reactive protein (hs-CRP) measures systemic inflammation throughout the body. Johnson’s levels became undetectable.
I had no detectable levels of systematic inflammation in my body. That is a wild result. Inflammation is often times the biggest culprit of problematic disease and dysfunction inside the body.
Chronic inflammation—sometimes called “inflammaging”—drives countless age-related diseases. Eliminating it represents a massive health win.
300% Increase in Blood Vessel Growth
Vascular endothelial growth factor (VEGF) signals the body to create new blood vessels. Johnson’s VEGF levels tripled.
Human bodies contain over 60,000 miles of blood vessels. Enhanced vascular growth improves nutrient delivery and waste removal throughout tissues.
Gut Health Transformed
Akkermansia muciniphila, a beneficial gut bacteria linked to metabolic health and gut barrier integrity, was undetectable in Johnson’s baseline tests.
After HBOT, his Akkermansia levels increased by 1,000%.
Remarkably, Johnson had been taking Akkermansia supplements for two months before HBOT with no detectable levels. The therapy dramatically enhanced his body’s ability to absorb and utilize the probiotic.
Alzheimer’s Risk Marker Dropped 28.6%
PAI-1 (plasminogen activator inhibitor-1) at elevated levels indicates increased Alzheimer’s disease risk. Johnson’s already-healthy baseline levels declined further by 28.6%.
Dramatic Skin Rejuvenation
Visual changes in skin health represented perhaps the most obvious transformation. Research shows HBOT can deliver:
- 12.8% increase in collagen fiber density
- 144% increase in elastic fiber length
- Reduction in fragmentation from 90% to 10%
- 40.9% increase in blood vessel count
Multispectral imaging showed Johnson’s UV skin damage improved by over 10%. HBOT essentially became “the world’s best whole body skin rejuvenation therapy.”
Telomere Lengthening
Telomeres are protective caps on chromosome ends, like shoelace tips. They shorten with age, serving as biological clocks.
Studies in populations aged 65+ showed HBOT could increase telomere length up to 38% while reducing senescent cells (which emit harmful inflammatory signals) by 37%.
Johnson’s telomeres measured 11.4 kilobases at baseline—equivalent to a 10-year-old’s biological age. After HBOT, they increased to 11.7 KB, a 2.6% gain.
That 300 base pair increase represents roughly a decade of aging reversed, since people typically lose 20-40 base pairs yearly.
Athletic Performance Gains
Research shows HBOT can enhance athletic performance without changing training or diet:
- 10-15% improvement in VO2 max and anaerobic threshold
- 7-10% increase in grip strength
- 9.2% improvement in Olympic triathlon times
Johnson pursued HBOT for longevity, performance, and telomere lengthening—achieving meaningful gains across all three objectives.
What’s Next? The Maintenance Question
Having completed his intensive protocol, Johnson faces a question experts can’t definitively answer: what’s the optimal maintenance dose?
Current thinking suggests approximately 20 sessions every three months. The goal is consistently signaling the body to produce stem cells, VEGF, and blood vessels—enough stimulus to maintain benefits without overdoing it.
I’ve learned this with blueprint is there’s definitely a the dose is the poison, the dose is the longevity benefit.
Practical Considerations Before Starting HBOT
If these results excite you—and they should—Johnson offers crucial guidance for anyone considering HBOT.
Protocol Matters
Sessions must occur within a constrained timeframe for benefits to accumulate. Spreading them too far apart undermines effectiveness.
Johnson’s intensive 60-sessions-in-90-days protocol represents the aggressive end of the spectrum, but consistency remains critical at any frequency.
Cost and Accessibility
Clinics typically charge several hundred dollars per session, making 60 sessions a significant investment. Johnson hopes increasing popularity will drive more centers to open and systems to become more affordable.
Consult Your Doctor
Always consult healthcare providers before beginning HBOT. Individual conditions may create unique considerations or contraindications.
Finding Quality Providers
Johnson recognizes the challenge of finding qualified HBOT providers. He’s developing Blueprint Quantified, an initiative to certify clinics using evidence-based approaches.
Certified providers would follow protocols including baseline biomarker measurements, standardized therapy delivery, and follow-up testing—creating verifiable outcomes instead of empty promises.
This certification system aims to improve healthcare quality and help patients know whether interventions actually work for their specific goals.
The Bottom Line
Johnson invested 5,400 minutes and significant resources into his HBOT experiment. His comprehensive biomarker testing revealed improvements across virtually every measure of health and aging.
From eliminating systemic inflammation to dramatically improving gut health, skin quality, and even telomere length, HBOT delivered results rarely seen from single interventions.
I think it’s reasonable to say that HBOT is the most efficacious longevity therapy I’ve done since starting this endeavor.
While HBOT requires significant time commitment and financial investment, Johnson’s results suggest it may represent one of the most powerful tools available for those serious about extending healthspan and reversing biological aging.
